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Re: Jeep Cherokee 1990 - not charging
Yup, the mallet trick sometimes tells all.
Hopefully you got it before the slip rings got damaged. I would do one more test just to see if the mallet did something else. I would run a battery booster cable from the battery negative to the alternator case and see if the charging goes stable. If so, the alternator case would have a bad ground that the hit moved slightly. It is a sneaky one, but seems to happen on Jeeps a lot. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 (More Off Road album links at bottom of the view page) Odd-Inge Larsen wrote: > I did charge the battery. Seems ok now. Probably just low due to alternator > failing. > > Did try to knock on the alternator with a rubber mallet. This probably moved > the brushes some and the voltmeter jumped to about 14 volts, its normal > position. But it fluctuated a great deal and the interior lights flickered a > lot. Revved it up and it was not able to charge anymore. Let off the > throttle and it charged again. > > My diagnoses: Worn brushes in the alternator. Replace brushes or by new > alternator. > > Does this seem like a reasonable diagnosis? > > regards > Odd-Inge > > "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message > news:f5k6hg$ckd$1@troll.powertech.no... >> Noticed today that my voltmeter was well in the red while driving to the >> store. No problem starting yet but only drove 3 km. >> >> This is on a 1990 Jeep Cherokee 4.0L >> >> Something like this happend some years ago and then I had to get a new >> alternator. Suspect the same this time, but would like some tips on what >> to check before ordering a new alternator or having a mechanic check this >> out. >> >> I have a battery tester and a multimeter at hand. I plan to first check >> the battery with the tester to see if it works ok with load. Then measure >> battery volts when the car is not running (should be something like 12V) >> and when car is running (should be higher, preferably 14.4V). >> >> Of course I will try cleaning battery connections (Optima red top battery, >> some years old). >> >> Anything else I could check? >> >> regards >> Odd-Inge Larsen >> North Norway >> > > |
Re: Jeep Cherokee 1990 - not charging
Tried the cable trick. Made no difference.
As it is difficult to get new brushes where I live and the label on the alternator can not be read without removing alternator I ordered a new alternator. Also one could never know if anything else was damaged inside. Dealer wanted nkr 4041,- for the original part and it had to be shipped from Germany. Found a new 100A (in stock) at a store located at the norwegian Amcar club for nkr 1763,- included VAT and shipping. (aprox US$ 271) Hope to have it fixed later this week if all goes well. Thanks for the help guys. Odd-Inge "Mike Romain" <romainm@sympatico.ca> wrote in message news:467e8e71$0$11813$9a6e19ea@unlimited.newshosti ng.com... > Yup, the mallet trick sometimes tells all. > > Hopefully you got it before the slip rings got damaged. > > I would do one more test just to see if the mallet did something else. I > would run a battery booster cable from the battery negative to the > alternator case and see if the charging goes stable. If so, the > alternator case would have a bad ground that the hit moved slightly. It > is a sneaky one, but seems to happen on Jeeps a lot. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's - Gone to the rust pile... > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > Odd-Inge Larsen wrote: >> I did charge the battery. Seems ok now. Probably just low due to >> alternator failing. >> >> Did try to knock on the alternator with a rubber mallet. This probably >> moved the brushes some and the voltmeter jumped to about 14 volts, its >> normal position. But it fluctuated a great deal and the interior lights >> flickered a lot. Revved it up and it was not able to charge anymore. Let >> off the throttle and it charged again. >> >> My diagnoses: Worn brushes in the alternator. Replace brushes or by new >> alternator. >> >> Does this seem like a reasonable diagnosis? >> >> regards >> Odd-Inge >> >> "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message >> news:f5k6hg$ckd$1@troll.powertech.no... >>> Noticed today that my voltmeter was well in the red while driving to the >>> store. No problem starting yet but only drove 3 km. >>> >>> This is on a 1990 Jeep Cherokee 4.0L >>> >>> Something like this happend some years ago and then I had to get a new >>> alternator. Suspect the same this time, but would like some tips on what >>> to check before ordering a new alternator or having a mechanic check >>> this out. >>> >>> I have a battery tester and a multimeter at hand. I plan to first check >>> the battery with the tester to see if it works ok with load. Then >>> measure battery volts when the car is not running (should be something >>> like 12V) and when car is running (should be higher, preferably 14.4V). >>> >>> Of course I will try cleaning battery connections (Optima red top >>> battery, some years old). >>> >>> Anything else I could check? >>> >>> regards >>> Odd-Inge Larsen >>> North Norway >>> >> |
Re: Jeep Cherokee 1990 - not charging
Tried the cable trick. Made no difference.
As it is difficult to get new brushes where I live and the label on the alternator can not be read without removing alternator I ordered a new alternator. Also one could never know if anything else was damaged inside. Dealer wanted nkr 4041,- for the original part and it had to be shipped from Germany. Found a new 100A (in stock) at a store located at the norwegian Amcar club for nkr 1763,- included VAT and shipping. (aprox US$ 271) Hope to have it fixed later this week if all goes well. Thanks for the help guys. Odd-Inge "Mike Romain" <romainm@sympatico.ca> wrote in message news:467e8e71$0$11813$9a6e19ea@unlimited.newshosti ng.com... > Yup, the mallet trick sometimes tells all. > > Hopefully you got it before the slip rings got damaged. > > I would do one more test just to see if the mallet did something else. I > would run a battery booster cable from the battery negative to the > alternator case and see if the charging goes stable. If so, the > alternator case would have a bad ground that the hit moved slightly. It > is a sneaky one, but seems to happen on Jeeps a lot. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's - Gone to the rust pile... > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > Odd-Inge Larsen wrote: >> I did charge the battery. Seems ok now. Probably just low due to >> alternator failing. >> >> Did try to knock on the alternator with a rubber mallet. This probably >> moved the brushes some and the voltmeter jumped to about 14 volts, its >> normal position. But it fluctuated a great deal and the interior lights >> flickered a lot. Revved it up and it was not able to charge anymore. Let >> off the throttle and it charged again. >> >> My diagnoses: Worn brushes in the alternator. Replace brushes or by new >> alternator. >> >> Does this seem like a reasonable diagnosis? >> >> regards >> Odd-Inge >> >> "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message >> news:f5k6hg$ckd$1@troll.powertech.no... >>> Noticed today that my voltmeter was well in the red while driving to the >>> store. No problem starting yet but only drove 3 km. >>> >>> This is on a 1990 Jeep Cherokee 4.0L >>> >>> Something like this happend some years ago and then I had to get a new >>> alternator. Suspect the same this time, but would like some tips on what >>> to check before ordering a new alternator or having a mechanic check >>> this out. >>> >>> I have a battery tester and a multimeter at hand. I plan to first check >>> the battery with the tester to see if it works ok with load. Then >>> measure battery volts when the car is not running (should be something >>> like 12V) and when car is running (should be higher, preferably 14.4V). >>> >>> Of course I will try cleaning battery connections (Optima red top >>> battery, some years old). >>> >>> Anything else I could check? >>> >>> regards >>> Odd-Inge Larsen >>> North Norway >>> >> |
Re: Jeep Cherokee 1990 - not charging
Tried the cable trick. Made no difference.
As it is difficult to get new brushes where I live and the label on the alternator can not be read without removing alternator I ordered a new alternator. Also one could never know if anything else was damaged inside. Dealer wanted nkr 4041,- for the original part and it had to be shipped from Germany. Found a new 100A (in stock) at a store located at the norwegian Amcar club for nkr 1763,- included VAT and shipping. (aprox US$ 271) Hope to have it fixed later this week if all goes well. Thanks for the help guys. Odd-Inge "Mike Romain" <romainm@sympatico.ca> wrote in message news:467e8e71$0$11813$9a6e19ea@unlimited.newshosti ng.com... > Yup, the mallet trick sometimes tells all. > > Hopefully you got it before the slip rings got damaged. > > I would do one more test just to see if the mallet did something else. I > would run a battery booster cable from the battery negative to the > alternator case and see if the charging goes stable. If so, the > alternator case would have a bad ground that the hit moved slightly. It > is a sneaky one, but seems to happen on Jeeps a lot. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's - Gone to the rust pile... > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > Odd-Inge Larsen wrote: >> I did charge the battery. Seems ok now. Probably just low due to >> alternator failing. >> >> Did try to knock on the alternator with a rubber mallet. This probably >> moved the brushes some and the voltmeter jumped to about 14 volts, its >> normal position. But it fluctuated a great deal and the interior lights >> flickered a lot. Revved it up and it was not able to charge anymore. Let >> off the throttle and it charged again. >> >> My diagnoses: Worn brushes in the alternator. Replace brushes or by new >> alternator. >> >> Does this seem like a reasonable diagnosis? >> >> regards >> Odd-Inge >> >> "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message >> news:f5k6hg$ckd$1@troll.powertech.no... >>> Noticed today that my voltmeter was well in the red while driving to the >>> store. No problem starting yet but only drove 3 km. >>> >>> This is on a 1990 Jeep Cherokee 4.0L >>> >>> Something like this happend some years ago and then I had to get a new >>> alternator. Suspect the same this time, but would like some tips on what >>> to check before ordering a new alternator or having a mechanic check >>> this out. >>> >>> I have a battery tester and a multimeter at hand. I plan to first check >>> the battery with the tester to see if it works ok with load. Then >>> measure battery volts when the car is not running (should be something >>> like 12V) and when car is running (should be higher, preferably 14.4V). >>> >>> Of course I will try cleaning battery connections (Optima red top >>> battery, some years old). >>> >>> Anything else I could check? >>> >>> regards >>> Odd-Inge Larsen >>> North Norway >>> >> |
Re: Jeep Cherokee 1990 - not charging
Tried the cable trick. Made no difference.
As it is difficult to get new brushes where I live and the label on the alternator can not be read without removing alternator I ordered a new alternator. Also one could never know if anything else was damaged inside. Dealer wanted nkr 4041,- for the original part and it had to be shipped from Germany. Found a new 100A (in stock) at a store located at the norwegian Amcar club for nkr 1763,- included VAT and shipping. (aprox US$ 271) Hope to have it fixed later this week if all goes well. Thanks for the help guys. Odd-Inge "Mike Romain" <romainm@sympatico.ca> wrote in message news:467e8e71$0$11813$9a6e19ea@unlimited.newshosti ng.com... > Yup, the mallet trick sometimes tells all. > > Hopefully you got it before the slip rings got damaged. > > I would do one more test just to see if the mallet did something else. I > would run a battery booster cable from the battery negative to the > alternator case and see if the charging goes stable. If so, the > alternator case would have a bad ground that the hit moved slightly. It > is a sneaky one, but seems to happen on Jeeps a lot. > > Mike > 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 > 88 Cherokee 235 BFG AT's - Gone to the rust pile... > Canadian Off Road Trips Photos: Non members can still view! > Jan/06 http://www.imagestation.com/album/pi...?id=2115147590 > (More Off Road album links at bottom of the view page) > > Odd-Inge Larsen wrote: >> I did charge the battery. Seems ok now. Probably just low due to >> alternator failing. >> >> Did try to knock on the alternator with a rubber mallet. This probably >> moved the brushes some and the voltmeter jumped to about 14 volts, its >> normal position. But it fluctuated a great deal and the interior lights >> flickered a lot. Revved it up and it was not able to charge anymore. Let >> off the throttle and it charged again. >> >> My diagnoses: Worn brushes in the alternator. Replace brushes or by new >> alternator. >> >> Does this seem like a reasonable diagnosis? >> >> regards >> Odd-Inge >> >> "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message >> news:f5k6hg$ckd$1@troll.powertech.no... >>> Noticed today that my voltmeter was well in the red while driving to the >>> store. No problem starting yet but only drove 3 km. >>> >>> This is on a 1990 Jeep Cherokee 4.0L >>> >>> Something like this happend some years ago and then I had to get a new >>> alternator. Suspect the same this time, but would like some tips on what >>> to check before ordering a new alternator or having a mechanic check >>> this out. >>> >>> I have a battery tester and a multimeter at hand. I plan to first check >>> the battery with the tester to see if it works ok with load. Then >>> measure battery volts when the car is not running (should be something >>> like 12V) and when car is running (should be higher, preferably 14.4V). >>> >>> Of course I will try cleaning battery connections (Optima red top >>> battery, some years old). >>> >>> Anything else I could check? >>> >>> regards >>> Odd-Inge Larsen >>> North Norway >>> >> |
Re: Jeep Cherokee 1990 - not charging
On Jun 23, 3:23 pm, "Odd-Inge Larsen" <oddingelar...@dcpost.no> wrote:
> Noticed today that my voltmeter was well in the red while driving to the > store. No problem starting yet but only drove 3 km. > > This is on a 1990 Jeep Cherokee 4.0L > > Something like this happend some years ago and then I had to get a new > alternator. Suspect the same this time, but would like some tips on what to > check before ordering a new alternator or having a mechanic check this out. > > I have a battery tester and a multimeter at hand. I plan to first check the > battery with the tester to see if it works ok with load. Then measure > battery volts when the car is not running (should be something like 12V) and > when car is running (should be higher, preferably 14.4V). > > Of course I will try cleaning battery connections (Optima red top battery, > some years old). > > Anything else I could check? > > regards > Odd-Inge Larsen > North Norway Make sure the exciter wire has a good connection, it's the small one going to the alt.......Have a good day |
Re: Jeep Cherokee 1990 - not charging
On Jun 23, 3:23 pm, "Odd-Inge Larsen" <oddingelar...@dcpost.no> wrote:
> Noticed today that my voltmeter was well in the red while driving to the > store. No problem starting yet but only drove 3 km. > > This is on a 1990 Jeep Cherokee 4.0L > > Something like this happend some years ago and then I had to get a new > alternator. Suspect the same this time, but would like some tips on what to > check before ordering a new alternator or having a mechanic check this out. > > I have a battery tester and a multimeter at hand. I plan to first check the > battery with the tester to see if it works ok with load. Then measure > battery volts when the car is not running (should be something like 12V) and > when car is running (should be higher, preferably 14.4V). > > Of course I will try cleaning battery connections (Optima red top battery, > some years old). > > Anything else I could check? > > regards > Odd-Inge Larsen > North Norway Make sure the exciter wire has a good connection, it's the small one going to the alt.......Have a good day |
Re: Jeep Cherokee 1990 - not charging
On Jun 23, 3:23 pm, "Odd-Inge Larsen" <oddingelar...@dcpost.no> wrote:
> Noticed today that my voltmeter was well in the red while driving to the > store. No problem starting yet but only drove 3 km. > > This is on a 1990 Jeep Cherokee 4.0L > > Something like this happend some years ago and then I had to get a new > alternator. Suspect the same this time, but would like some tips on what to > check before ordering a new alternator or having a mechanic check this out. > > I have a battery tester and a multimeter at hand. I plan to first check the > battery with the tester to see if it works ok with load. Then measure > battery volts when the car is not running (should be something like 12V) and > when car is running (should be higher, preferably 14.4V). > > Of course I will try cleaning battery connections (Optima red top battery, > some years old). > > Anything else I could check? > > regards > Odd-Inge Larsen > North Norway Make sure the exciter wire has a good connection, it's the small one going to the alt.......Have a good day |
Re: Jeep Cherokee 1990 - not charging
On Jun 23, 3:23 pm, "Odd-Inge Larsen" <oddingelar...@dcpost.no> wrote:
> Noticed today that my voltmeter was well in the red while driving to the > store. No problem starting yet but only drove 3 km. > > This is on a 1990 Jeep Cherokee 4.0L > > Something like this happend some years ago and then I had to get a new > alternator. Suspect the same this time, but would like some tips on what to > check before ordering a new alternator or having a mechanic check this out. > > I have a battery tester and a multimeter at hand. I plan to first check the > battery with the tester to see if it works ok with load. Then measure > battery volts when the car is not running (should be something like 12V) and > when car is running (should be higher, preferably 14.4V). > > Of course I will try cleaning battery connections (Optima red top battery, > some years old). > > Anything else I could check? > > regards > Odd-Inge Larsen > North Norway Make sure the exciter wire has a good connection, it's the small one going to the alt.......Have a good day |
Re: Jeep Cherokee 1990 - not charging
Have now changed alternator. Bits was falling out of the old one when I took
it out. Something had smashed the internal cooling fan blades. The new one is working fine. Charging around 14 volts again :-) And much more quiet. Odd-Inge "Odd-Inge Larsen" <oddingelarsen@dcpost.no> wrote in message news:f5k6hg$ckd$1@troll.powertech.no... > Noticed today that my voltmeter was well in the red while driving to the > store. No problem starting yet but only drove 3 km. > > This is on a 1990 Jeep Cherokee 4.0L > > Something like this happend some years ago and then I had to get a new > alternator. Suspect the same this time, but would like some tips on what > to check before ordering a new alternator or having a mechanic check this > out. > > I have a battery tester and a multimeter at hand. I plan to first check > the battery with the tester to see if it works ok with load. Then measure > battery volts when the car is not running (should be something like 12V) > and when car is running (should be higher, preferably 14.4V). > > Of course I will try cleaning battery connections (Optima red top battery, > some years old). > > Anything else I could check? > > regards > Odd-Inge Larsen > North Norway > |
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